the world > matter > physics > atomic physics > decomposition of light, spectrum > [noun] > spectral line (9)
A narrow region in a spectrum, appearing to the eye as a fine straight black or shining stroke transverse to the length of the spectrum (cf. Fraun…
Subcategories:
— width of (1)
— part of (1)
— emitted by substance in furnace (1)
— caused by irregularity, spurious (2)
— remaining detectable longest (1)
— at lower frequency (1)
— factor predicting profile (1)